U

unary minus or negation XPath numeric operator , 284

unary plus XPath numeric operator , 284

Unicode characters , 26

UNION clause

defined, 89

SELECT statement, 115

union list declarations, XSD , 378

uniqueID() method, 81

Universal Resource Locator (URL) , 285

unsignedInt data type, 372

unsignedLong data type, 372

unsignedOut data type, 372

unsignedShort data type, 372

untyped XML data type , 166167

UPDATE command

discussed, 89

subqueries, 120

table records, 119

uppercase characters, element naming rules , 17

URI function, XPath scripting language , 285

URL (Universal Resource Locator) , 285

user --defined types , 146

USING clause, JOIN clause, 104106